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首页> 外文期刊>Journal of Nuclear Physics, Material Sciences, Radiation and Applications >X-Ray Fluorescence Analysis of Ground Coffee
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X-Ray Fluorescence Analysis of Ground Coffee

机译：研磨咖啡的X射线荧光分析

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摘要

Coffee is becoming one of the most popular beverages in Mexico. In the present work, X-ray Fluorescence (XRF) was used to determine the contents of several elements (with atomic numbers between 11 and 38) in 11 samples of commercial ground coffee, comparing with another one of soluble coffee and two of used ground coffee. Samples were dried at room temperature and pelletized. XRF analyses were carried out using a spectrometer based on an Rh X-ray tube, registering the characteristic x-rays with a Silicon Drift Detector. The system detection calibration and accuracy check was performed through the analysis of NIST certified reference materials 1547 (peach leaves), 1570a (spinach leaves), 1573a (tomato leaves), and 1571 (orchid leaves). As a general rule, the elemental concentrations measured are similar in all samples of coffee, in values not exceeding toxic levels. However, the differences among the elemental concentrations are shown.
机译：咖啡正成为墨西哥最受欢迎的饮料之一。在本工作中，使用X射线荧光法（XRF）来确定11种商品咖啡粉样品中几种元素（原子序数在11和38之间）的含量，然后与另一种可溶性咖啡粉和两种二手咖啡粉进行比较咖啡。样品在室温下干燥并造粒。使用基于Rh X射线管的光谱仪进行XRF分析，并用Silicon Drift Detector记录特征X射线。通过对NIST认证的参考材料1547（桃叶），1570a（菠菜叶），1573a（西红柿叶）和1571（兰花叶）进行分析，进行系统检测校准和准确性检查。通常，在所有咖啡样品中测得的元素浓度都相似，其值不得超过毒性水平。但是，显示了元素浓度​​之间的差异。

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